package com.example.mallcommon.utils;

import com.example.mallcommon.constant.KeyConstants;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.net.ssl.*;
import java.io.*;
import java.net.ConnectException;
import java.net.SocketTimeoutException;
import java.net.URL;
import java.net.URLConnection;
import java.security.cert.X509Certificate;

public class HttpUtils {
  private static final Logger log = LoggerFactory.getLogger(HttpUtils.class);

  /**
   * 向指定 URL 发送GET方法的请求
   *
   * @param url 发送请求的 URL
   * @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
   * @return 所代表远程资源的响应结果
   */
  public static String sendGet(String url, String param) {
    return sendGet(url, param, KeyConstants.UTF8);
  }

  /**
   * 向指定 URL 发送GET方法的请求
   *
   * @param url 发送请求的 URL
   * @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
   * @param contentType 编码类型
   * @return 所代表远程资源的响应结果
   */
  public static String sendGet(String url, String param, String contentType) {
    StringBuilder result = new StringBuilder();
    BufferedReader in = null;
    try {
      String urlNameString = url + "?" + param;
      log.info("sendGet - {}", urlNameString);
      URL realUrl = new URL(urlNameString);
      URLConnection connection = realUrl.openConnection();
      connection.setRequestProperty("accept", "*/*");
      connection.setRequestProperty("connection", "Keep-Alive");
      connection.setRequestProperty(
          "user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
      connection.connect();
      in = new BufferedReader(new InputStreamReader(connection.getInputStream(), contentType));
      String line;
      while ((line = in.readLine()) != null) {
        result.append(line);
      }
      log.info("recv - {}", result);
    } catch (ConnectException e) {
      log.error("调用HttpUtils.sendGet ConnectException, url=" + url + ",param=" + param, e);
    } catch (SocketTimeoutException e) {
      log.error("调用HttpUtils.sendGet SocketTimeoutException, url=" + url + ",param=" + param, e);
    } catch (IOException e) {
      log.error("调用HttpUtils.sendGet IOException, url=" + url + ",param=" + param, e);
    } catch (Exception e) {
      log.error("调用HttpsUtil.sendGet Exception, url=" + url + ",param=" + param, e);
    } finally {
      try {
        if (in != null) {
          in.close();
        }
      } catch (Exception ex) {
        log.error("调用in.close Exception, url=" + url + ",param=" + param, ex);
      }
    }
    return result.toString();
  }

  /**
   * 向指定 URL 发送POST方法的请求
   *
   * @param url 发送请求的 URL
   * @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
   * @return 所代表远程资源的响应结果
   */
  public static String sendPost(String url, String param) {
    PrintWriter out = null;
    BufferedReader in = null;
    StringBuilder result = new StringBuilder();
    try {
      String urlNameString = url;
      log.info("sendPost - {}", urlNameString);
      URL realUrl = new URL(urlNameString);
      URLConnection conn = realUrl.openConnection();
      conn.setRequestProperty("accept", "*/*");
      conn.setRequestProperty("connection", "Keep-Alive");
      conn.setRequestProperty(
          "user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
      conn.setRequestProperty("Accept-Charset", "utf-8");
      conn.setRequestProperty("contentType", "utf-8");
      conn.setDoOutput(true);
      conn.setDoInput(true);
      out = new PrintWriter(conn.getOutputStream());
      out.print(param);
      out.flush();
      in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "utf-8"));
      String line;
      while ((line = in.readLine()) != null) {
        result.append(line);
      }
      log.info("recv - {}", result);
    } catch (ConnectException e) {
      log.error("调用HttpUtils.sendPost ConnectException, url=" + url + ",param=" + param, e);
    } catch (SocketTimeoutException e) {
      log.error("调用HttpUtils.sendPost SocketTimeoutException, url=" + url + ",param=" + param, e);
    } catch (IOException e) {
      log.error("调用HttpUtils.sendPost IOException, url=" + url + ",param=" + param, e);
    } catch (Exception e) {
      log.error("调用HttpsUtil.sendPost Exception, url=" + url + ",param=" + param, e);
    } finally {
      try {
        if (out != null) {
          out.close();
        }
        if (in != null) {
          in.close();
        }
      } catch (IOException ex) {
        log.error("调用in.close Exception, url=" + url + ",param=" + param, ex);
      }
    }
    return result.toString();
  }

  public static String sendSSLPost(String url, String param) {
    StringBuilder result = new StringBuilder();
    String urlNameString = url + "?" + param;
    try {
      log.info("sendSSLPost - {}", urlNameString);
      SSLContext sc = SSLContext.getInstance("SSL");
      sc.init(
          null, new TrustManager[] {new TrustAnyTrustManager()}, new java.security.SecureRandom());
      URL console = new URL(urlNameString);
      HttpsURLConnection conn = (HttpsURLConnection) console.openConnection();
      conn.setRequestProperty("accept", "*/*");
      conn.setRequestProperty("connection", "Keep-Alive");
      conn.setRequestProperty(
          "user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
      conn.setRequestProperty("Accept-Charset", "utf-8");
      conn.setRequestProperty("contentType", "utf-8");
      conn.setDoOutput(true);
      conn.setDoInput(true);

      conn.setSSLSocketFactory(sc.getSocketFactory());
      conn.setHostnameVerifier(new TrustAnyHostnameVerifier());
      conn.connect();
      InputStream is = conn.getInputStream();
      BufferedReader br = new BufferedReader(new InputStreamReader(is));
      String ret = "";
      while ((ret = br.readLine()) != null) {
        if (ret != null && !"".equals(ret.trim())) {
          result.append(new String(ret.getBytes("ISO-8859-1"), "utf-8"));
        }
      }
      log.info("recv - {}", result);
      conn.disconnect();
      br.close();
    } catch (ConnectException e) {
      log.error("调用HttpUtils.sendSSLPost ConnectException, url=" + url + ",param=" + param, e);
    } catch (SocketTimeoutException e) {
      log.error(
          "调用HttpUtils.sendSSLPost SocketTimeoutException, url=" + url + ",param=" + param, e);
    } catch (IOException e) {
      log.error("调用HttpUtils.sendSSLPost IOException, url=" + url + ",param=" + param, e);
    } catch (Exception e) {
      log.error("调用HttpsUtil.sendSSLPost Exception, url=" + url + ",param=" + param, e);
    }
    return result.toString();
  }

  private static class TrustAnyTrustManager implements X509TrustManager {
    @Override
    public void checkClientTrusted(X509Certificate[] chain, String authType) {}

    @Override
    public void checkServerTrusted(X509Certificate[] chain, String authType) {}

    @Override
    public X509Certificate[] getAcceptedIssuers() {
      return new X509Certificate[] {};
    }
  }

  private static class TrustAnyHostnameVerifier implements HostnameVerifier {
    @Override
    public boolean verify(String hostname, SSLSession session) {
      return true;
    }
  }
}
